The question doesn't have a vehicle year but it appears that all years had the same or similar rear wiper arm. Take a close look at the wiper arm where the wiper blade is attached/inserted. Then see related links below for wiper blade installation videos. Most likely its a hook arm, side lock pin or a flat bayonet.
To replace the wiper arms on a 1999 Mitsubishi 3000GT, first, lift the wiper arms away from the windshield. Locate the small retaining clip or nut at the base of each wiper arm and remove it using a socket or wrench. Once the arm is loose, gently wiggle and pull it off the wiper motor shaft. Install the new wiper arms by aligning them with the shaft and securing them with the clip or nut, then lower the arms back onto the windshield.
How to replace wiper motor on a 1998 montero sport mitsubishi
factory replacement. they are only $13 at Mitsubishi dealership
How do I replace the windshield wiper switch?
Replace the locking tab on top of the wiper
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To fix windshield wipers on a Volvo 940 try using new wiper fluid and cleaning the windshield and wiper blades before you replace the blades. It is also important to replace wiper blades regularly.
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To replace the windshield wiper blades on a Scion xB, first lift the wiper arms away from the windshield. Press the small tab on the underside of the wiper blade where it connects to the arm and slide the blade off the arm. Attach the new wiper blade by sliding it onto the arm until you hear a click, indicating it's secure. Finally, gently lower the wiper arms back onto the windshield.
The windshield wiper arm is held in place by a retaining clip. Hold the retaining clip in and the windshield wiper arm will come off. Put the new windshield wiper on and read lease the retaining clip.